CN101379006A - Adjuvant for hydraulic compositions - Google Patents
Adjuvant for hydraulic compositions Download PDFInfo
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- CN101379006A CN101379006A CNA2007800046925A CN200780004692A CN101379006A CN 101379006 A CN101379006 A CN 101379006A CN A2007800046925 A CNA2007800046925 A CN A2007800046925A CN 200780004692 A CN200780004692 A CN 200780004692A CN 101379006 A CN101379006 A CN 101379006A
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- China
- Prior art keywords
- admixture
- anionic polymer
- polymkeric substance
- pectination
- cationic polymers
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
- C04B24/2647—Polyacrylates; Polymethacrylates containing polyether side chains
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L43/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium or a metal; Compositions of derivatives of such polymers
- C08L43/04—Homopolymers or copolymers of monomers containing silicon
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08L61/30—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic and acyclic or carbocyclic compounds
Abstract
The invention provides an admixture for a hydraulic binder composition comprising at least one cationic polymer and at least one anionic polymer, at least one of these polymers having a comb type of structure, wherein the mass ratio of the anionic polymer/cationic polymer is from 99.9/0.1 to 60/40. It also provides a process for its preparation as well as its use as a plasticizer.
Description
Technical field
The present invention relates to be used for the field of the admixture (admixture) of hydraulic binder (hydraulic binder) composition, described admixture is especially for the admixture of dispersion agent, softening agent, super plasticizing agent and water reducer.
Background technology
Usually, for example add admixture to improve its character in the cement to hydraulic binder composition.Rheological property and be one of essential property of cement composition over time.
Especially, the softening agent that uses those to have the fluidisation cement composition and/or reduce the effect of water addition.Therefore, they are also referred to as water reducer.Cement composition thereby have higher level of density and generation has the more material of high mechanical strength.
Some soluble polymer that is called as super plasticizing agent can improve the amount of the mobile of cement composition and/or minimizing water more.Especially, known described super plasticizing agent such as poly-alkoxylation (polyalkoxyl é) poly carboxylic acid (PCP).In addition, these admixtures also show inconvenience.
Especially, known their character is very responsive to the variation of compound composition design.
The difference of these character makes people must test to determine the amount for the available admixture of every kind of hydraulic binder or every kind of aggregate.
Summary of the invention
The objective of the invention is to propose admixture, the performance of described admixture is not very sensitive to the chemical property of hydraulic compositions.
Embodiment
According to the present invention, reach described purpose by two kinds of the ionic polymers that in admixture, associate with opposite charges.
Yet, causing precipitating and the counteracting of character because tend to assemble by the cluster (cluster) that forms mutual neutral opposite charges, the solution of water-soluble polymers that therefore has opposite charges is unstable usually.
In fact, it should be noted that this association can stable existence when at least a when showing the pectination (comb structure) that comprises main chain and side group in two kinds of polymkeric substance.It is believed that the sterically hindered accessibility (accessibility) that might limit electric charge on the polymkeric substance with pectination, thereby avoid precipitation.
Therefore, according to first embodiment, the present invention relates to be used for the admixture of hydraulic binder composition, described composition comprises at least a cationic polymers and at least a anionic polymer, at least a in these polymkeric substance have a pectination, and wherein the mass ratio of anionic polymer/cationic polymers is 99.9/0.1 to 60/40.
In the scope of this specification sheets, term " hydraulic binder composition " refers to any hydraulic material, particularly comprises for example composition of Potrlant cement of cement.These compositions can be for example, to comprise the mortar of coarse aggregate in addition.The calcium sulfate of anhydrous form or half hydrated form also contained in this term.
Term " polymer " " refer to by forming by the interconnected monomer of covalent linkage, and be characterized as molecule with one or more repeating parts.Multipolymer that this term application forms in the homopolymer that constitutes by the molecule that associates from a kind of single part, by two kinds of different monomers generation polymerizations and the trimer that forms by three kinds of different monomers generation polymerizations.Also contain available from polymkeric substance more than three kinds of different monomers.
Term " cationic polymers " refers to that the major portion (substantial part) of its component units has the polymkeric substance of positive charge." cationic polymers " also can have negative charge.In this case, with respect to anionic charge, positively charged ion is in the great majority.
Similarly, term " anionic polymer " refers to that the major portion of its component units has the polymkeric substance of negative charge." anionic polymer " also can have positive charge.In this case, with respect to cationic charge, negatively charged ion is in the great majority.
Described positively charged ion or anionic polymer are attended by gegenion (counter-ion).For cationic polymers, they can be chlorion, sulfate radical, nitrate radical, acetate etc., and for anionic polymer, they can be sodium, potassium, ammonium etc.Described electric charge can be positioned on main chain or the side group.Recommend the gegenion of consumption can not influence concrete character.
Term " polymkeric substance with pectination " refers to have the polymkeric substance of the main chain that is connected with side group on it.Preferably, described polymkeric substance with pectination has the side group of polyoxyalkylated (polyoxyalkyl é s).Also preferably it has the part derived from (methyl) vinylformic acid or toxilic acid on its main chain.
Usually, the positively charged ion and the anionic polymer of suitable admixture of the present invention have no particular limits.
The back can or take place when polyreaction takes place introduce or produce ionic group in polymkeric substance, for example have ionic functional group's group introducing by grafting.
Cationic polymers
At first, admixture of the present invention comprises cationic polymers.
Especially, described cation group can be quaternary ammonium, Phosphonium, pyridine, sulfonium group.Preferably, described cation group can be a quaternary ammonium group.
Can obtain quaternary ammonium group by quaternized nitrogen-atoms, described nitrogen-atoms can be the part of amine or imines class group for example.
Known, can finish quaterisation by the reaction or the protonation of amine or imine group and methyl chloride especially.
Therefore, comprising amine or imines class polymkeric substance partly is particularly suitable for.These groups can be positioned on the main chain or side group of polymkeric substance.Preferably, they are positioned on the main chain.
Cationic polymers with pectination advantageously comprises the polyoxyalkylated group as its side group.
Can prepare described cationic polymers by conventional methods, especially, prepare by radical polymerization or by polycondensation.
Employed monomer can be a cationic monomer, its precursor, and/or optional, more a spot of nonionic or anionic copolymerization monomer.
The cationic monomer that is fit to that can mention is: diallyldimethylammonium chloride, randomly quaternised (methyl) propenoic acid dialkyl aminoalkyl ester and randomly quaternised (methyl) acrylamide that is replaced by dialkyl aminoalkyl N-.
In the non-ionic monomer that is fit to, the monomer that can mention is for example (methyl) vinylformic acid methoxy poly (ethylene glycol) ester, acrylamide, N-V-Pyrol RC, (methyl) vinylformic acid hydroxyethyl ester, N-vinyl-N-methylacetamide, (methyl) alkyl acrylate.
Also can be as US 3,725,312 described reactions by epihalohydrin (epihalohydrin) or diepoxide (diepoxide) and dialkylamine obtain cationic polymers, perhaps as FR 1,042,084 described polycondensation by Dyhard RU 100 and formaldehyde obtains cationic polymers.
Also can modify to introduce cation group polymkeric substance by back grafting (post grafting).This process comprises that for example hydroxyl or amine groups are modified to introduce cation group to reactive functional groups.Especially, this method can obtain to be derived from the cationic polymers of crude substance, for example is grafted with the starch of cation group.
Can by Mannich reaction use aldehyde for example formaldehyde and amine for example dimethylamine modify acrylamide (being total to) polymkeric substance.
Described admixture comprises the anionic polymer as second composition.
The preferred anionic surfactants group is: (methyl) vinylformic acid and toxilic acid or sulfonic acid group and their derivative, particularly their salt.
The preferred anionic surfactants polymkeric substance comprises following material:
(methyl) vinylformic acid, toxilic acid, ethene, allylic polymer;
Poly naphthalene sulfonate;
Sulfonated lignin;
Poly-melamine sulfonate.
Can be by comprising the monomeric polymerization, particularly radical polymerization of anionic group, or directly obtain anionic polymer by polymkeric substance is modified.
The anionic monomer that is suitable for radical polymerization that can mention especially is: the monomer with carboxyl functional group, as (methyl) vinylformic acid, methylene-succinic acid, toxilic acid etc., monomer with sulfonic acid functional group, for example acrylamido-2-methyl-2-propanesulfonic acid (AMPS), vinyl sulfonic acid, propane thioic acid (sulfopropylicacid) methacrylic ester or have the monomer of phosphoric acid functional group.
Particularly suitable nonionic (copolymerization) monomer is those nonionic that comprises one or more silanol or derivative (copolymerization) monomers.
Therefore, the anionic polymer preferred package contains the silanol side group.
Anionic polymer can be straight chain, side chain or pectination, preferred pectination.
Can obtain polymkeric substance by multiple route of synthesis,, or pass through as US 5,614 the back grafting of 017 described polyoxyalkylated side group particularly by as EP 0 056 627 described free radical copolymerizations with " pectination " structure.
Anionic polymer with pectination advantageously comprises the group as the polyoxyalkylated of its side group.
Advantageously, anionic polymer is a terpolymer.
According to the present invention, at least a polymkeric substance that is present in the admixture has pectination.It is preferably anionic polymer.
The ratio of the ionic group in positively charged ion and the anionic polymer can in very large range change.
The electric density of polymkeric substance is expressed as meq/g, the entrained quantity of electric charge (being expressed as mmol) of its expression 1g polymkeric substance.This numerical value can pass through colloidal titration or pH titrimetry.
The density of the ionic group in positively charged ion and the anionic polymer can in very large range change, but should be preferably greater than 0.1meq/g respectively and be preferably greater than 0.2meq/g.
Advantageously, the cationic degree of cationic polymers (cationicity) does not depend on or only depends on slightly the pH value.
Usually the average molar mass of negatively charged ion and cationic polymers is 10,000 to 1M (Mw), is preferably 10,000 to 500,000 (Mw).Especially, molar mass can be measured by intrinsic viscosity or by GPC.
Preferably, the limiting viscosity of polymkeric substance is less than 1.5dl/g, especially, and less than 1.0dl/g, more particularly, less than 0.8dl/g.
Index of polyphenol Ip (polymerization index) is preferably 1 to 5, is preferably 1.5 to 3.
Described admixture can prepare by its known preparation method at an easy rate, for example, by method known to those skilled in the art, prepares by mix the polymkeric substance with opposite charges in solution.
The mass ratio of anionic polymer/cationic polymers is 99.9/0.1 to 60/40, is preferably 99/1 to 70/30, more preferably 98/2 to 80/20.
In addition, according to another embodiment, the present invention relates to the preparation method of above-mentioned admixture, wherein at least a cationic polymers and at least a anionic polymer are mixed in suitable solvent, at least a in two kinds of polymkeric substance has pectination, and described solvent is preferably water.
Described admixture has outstanding plasticizing character, can be used for preparing the fluid hydraulic binder composition and/or is used to reduce the water yield.In addition, may obtain to reach the flowability of 90 minutes prolongation.The flowability that keeps 90 minutes is for for example ready mixed concrete of hydraulic binder composition (ready-mix concrete) particularly important of pre-preparation.
In addition,, the present invention relates to of the application of described admixture, especially for keeping hydraulic binder composition, particularly cement composition, for example Portland cement, mortar and concrete flowability as softening agent according to last embodiment.
Preferably, admixture is added in the mixing water of hydraulic binder composition.Also imagination joins admixture in a kind of raw material of composition in advance, and does not influence the character of admixture.Determine the consumption of admixture according to the flowability of target hydraulic binder composition.For example, for cement composition, with respect to the quality of cement, the plasticizer consumption of 0.10 to 1% dry weight can provide satisfied effect.
Below will use following indefiniteness embodiment to describe the present invention in detail.
Embodiment
A. the sign of polymkeric substance
Positively charged ion and anionic polymer are by its molecular weight, its ion degree (ionicity) and its structural characterization.
A. molecular weight
Can be by stratographic analysis or according to the molecular weight of Mark-Houwink formula from the used polymkeric substance of characteristic viscosity determining:
IV＝K.Mr
a
IV: limiting viscosity
Mr: molecular-weight average
K and a: the constant that depends on polymkeric substance, solvent and temperature.
Use capillary viscosimeter such as Ubbelhode class in 3M NaCl solution, under 25 ℃, to carry out the measurement of cationic polymers limiting viscosity.
In kapillary, measure the flowing time between two scales of the polymers soln of solvent and different concns.Under different concentration, " reduce " viscosity acquired character viscosity.
About the more details of this measurement, recommend following works: Encyclopedia of PolymerScience ﹠amp; Technology, Mark and Gaylord edit, John Wiley ﹠amp; Sons publishes, and 1971, Vol.14, p.717-740.
B. electric density
Represent the entrained quantity of electric charge (being expressed as mmol) of 1g polymkeric substance with positive charge density (cationic degree) or negative charge density (negatively charged ion degree) that meq/g represents.This numerical value can pass through colloidal titration or pH titrimetry.
The electric density of cationic polymers can be used anionic polymer such as the polyvinyl sulfuric acid potassium measurement with known ion degree level in the presence of indicator, the color of described indicator depends on the character of excess polymeric.
C. structure
Structure by viscosimetric analysis, rheological measurement and NMR assay determination polymkeric substance.
B. the preparation of polymkeric substance
A. the preparation of methacrylic acid/polyethylene glycol monomethyl ether alkylmethacrylate polymer 1100 (PA1)
In suitable reactor, add with mechanical stirring, heating system and nitrogen inert atmosphere:
Tetrahydrofuran (THF) 1502g
Methacrylic acid 113g
Polyethylene glycol monomethyl ether methacrylic ester 1100 887g
Thiovanic acid 2g
2,2 of weighing 5.27g '-azo two (2, the 4-methyl pentane nitrile) (Dupont produces Vazo 52), the solution of preparation initiator in 67g tetrahydrofuran (THF) (THF).
Guaranteeing under the condition of degasification, in N
2With stirring down reaction medium is heated to 60 ℃.Catalyst solution is added reaction medium, and solution was reacted 5:30 hour under 60 ℃ temperature.Add less water to stablize THF.Distillation is desolvated to remove under vacuum subsequently.
Products obtained therefrom is a viscous liquid, and it obtains the solution of concentration near 20 weight % through the water dilution.
The mol ratio (ester/acid) of gained PA1 polymkeric substance is 38/62, and molecular weight is 40000g/mol, and it has pectination.
Consumption with 0.5% quality/solution adds the tributyl phosphate defoamer in solution.
B. methacrylic acid/ethyl phosphonic acid METH acrylate/methoxyl group PEG2000 methacrylic acid
The preparation of ester terpolymer
This terpolymer comprises the ethyl phosphonic acid METH acrylate of the methacrylic acid of 66 moles of %, 9 moles of % and the methoxyl group PEG2000 methacrylic ester of 25 moles of %.
In suitable reactor, add with mechanical stirring, heating system and nitrogen inert atmosphere:
Water (jar end) 1250
Methacrylic acid (monomer phase) 49.3
Polyethylene glycol monomethyl ether methacrylic ester 2000-mass concentration 50% (monomer phase) 869g
Ethyl phosphonic acid METH acrylate (monomer phase) 16.4
The sodium salt 80.6 of 3-sulfydryl propanesulfonic acid
2,2 of weighing 12.28g '-azo two (2-methyl-prop amidine) dihydrochloride (Wako produces V50), the solution (initiator solution) of preparation initiator in 67g water.
The water of the described amount of (jar end) adding in reactor.Guaranteeing under the condition of degasification, in N
2With stir under be heated to 60 ℃.The sodium salt that adds 3-sulfydryl propanesulfonic acid subsequently.In 90 minutes, add the monomer phase continuously, simultaneously, in 120 minutes, add in the solution of initiator.In 120 minutes that add, temperature is remained on 60 ℃.
Products obtained therefrom is a viscous liquid, and it obtains the solution of concentration near 20 weight % through the water dilution.
The molecular weight of gained ter-polymers is 40000g/mol, and has pectination.
Consumption with 0.5% quality/solution adds the tributyl phosphate defoamer in solution.
C. methacrylic acid/propyl trimethoxy silyl methacrylic ester/methoxyl group PEG11000
The preparation of methacrylic ester terpolymer
This terpolymer comprises the propyl trimethoxy silyl methacrylic ester of the methacrylic acid of 42 moles of %, 10 moles of % and the methoxyl group PEG1100 methacrylic ester of 48 moles of %.
In suitable reactor, add with mechanical stirring, heating system and nitrogen inert atmosphere:
Methacrylic acid 30.7
Propyl trimethoxy silyl methacrylic ester 21.2g
Methoxyl group PEG1100 methacrylic ester 448.3g
Thiovanic acid 4.81g
Weighing methacrylic acid, propyl trimethoxy silyl methacrylic ester and methoxyl group PEG1100 methacrylic ester in reactor.Guaranteeing under the condition of degasification, in N
2With stir under be heated to 80 ℃.Add Thiovanic acid and 8.62g AIBN subsequently.Subsequently, reaction medium was kept two hours down at 80 ℃.
Products obtained therefrom is a viscous liquid, and it obtains the solution of concentration near 20 weight % through the water dilution.
Synthetic generation molecular weight is 40000g/mol, has the ter-polymers of pectination.
Consumption with 0.5% quality/solution adds the tributyl phosphate defoamer in solution.
Prepare negatively charged ion PA2 polymkeric substance by what mix 20 weight % according to the anionic polymer of such scheme b preparation and the anionic polymer of 80 weight % according to such scheme c preparation.
D. ethyl trimethyl ammonium methacrylic ester methylsulfuric acid ester/methoxyl group PEG1100 methacrylic
The preparation of acid esters (PC2) multipolymer
In suitable reactor, add with mechanical stirring, heating system and nitrogen inert atmosphere:
Water 200g
Methoxyl group PEG1100 methacrylic ester (20 moles of %) 49.3g
Ethyl trimethyl ammonium methacrylic ester methylsulfuric acid ester (mass concentration %) 63.4g
The sodium salt 1g of 3-sulfydryl propanesulfonic acid
The water of weighing aequum in reactor, and guaranteeing under the condition of degasification, in N
2With stir be heated to down 60 ℃ lasting 30 minutes.The sodium salt, the monomer that add 3-sulfydryl propanesulfonic acid subsequently successively add 2,2 of 24.28g '-azo two (2-methyl-prop amidine) dihydrochloride (Wako produces V50) at last.Reaction medium was kept 2 hours down at 60 ℃.
Products obtained therefrom is a viscous liquid, and it obtains the solution of concentration near 20 weight % through the water dilution.
Synthetic generation molecular weight is 40000g/mol, and has the PC2 multipolymer of pectination.
Consumption with 0.5% quality/solution adds the tributyl phosphate defoamer in solution.
C. the assessment of admixture
Measure the efficient of admixture by mortar sprawling after 5,15,30,60 and 90 minutes (spread) situation of the feedstock production of different sources by measurement.
In following test, in mixing water, add softening agent.
In the cup (bowl) of Perrier mixing tank, successively add the sand and the water (pre-wetting water) of prewetting, under low speed, stir (140tr/min).Binding agent (cement, filler) is preceding to leave standstill them 4 minutes adding.Under low speed, mixed 1 minute again, in 30 seconds, under low speed, add the admixture of mixing water and interpolation subsequently.At last, remix 2 minutes under 280tr/min.
Use the character of two kinds of sand cement testing admixture different with two kinds, the source of sand and cement is shown in the following table 1.
Two kinds of sand have different sources.Cement N ° 1 comprises more vitriol than cement N ° 2.
Table 1: the sand of test and the source of cement
| Sand N ° 1 | The standard siliceous sand that meets EN 196.1 standards available from " Soci é t é Nouvelle du Littoral " |
| Sand N ° 2 | Siliceous-limestone sand available from Palvadeau quarry (Lafarge) |
| Cement N ° 1 | CEM?I-52.5N-Saint?Pierre?La?Cour(Lafarge) |
| Cement N ° 2 | CEM?I-52.5N-Le?Havre(Lafarge) |
Cement compositions by sand N ° 1 and sand N ° of 2 preparations are shown in following table 2 and table 3 respectively.
Table 2: the cement composition that comprises sand N ° 1
| Quality (g) | |
| Cement CEM I 52.5N according to EN 197 | 480.4 |
| Limestone filler | 359.1 |
| Standard sand 0/2mm | 1350 |
| Sand PE2LS B2 | 200.1 |
| The water of prewetting | 100 |
| Softening agent (doing) | X |
| Mixing water | 227 |
| Total Water | 327 |
Table 3: the cement composition that comprises sand N ° 2
| Quality (g) | |
| Cement CEM I 52.5N according to EN197 | 625.2 |
| Filler BL 200 | 416.2 |
| Palvadeau sand 0/0.315mm | 444.3 |
| Palvadeau sand 0.315/1mm | 880.1 |
| Palvadeau sand 1/4mm | 470.1 |
| Palvadeau sand 2/4mm | 163.2 |
| The water of prewetting | 117.5 |
| Softening agent (doing) | Y |
| Mixing water | 290.8 |
| Total Water | 408.3 |
By in aqueous solution, preparing admixture of the present invention by mixed anionic polymer in the table 4 and cationic polymers with 20 weight %.
Table 4: the composition of admixture
| Embodiment | Cationic polymers (CP) | Anionic polymer (AP) | The CP/AP mass ratio |
| 1 | CP?N°1 * | AP?N°1 | 1/99 |
| 2 | CP?N°1 * | AP?N°1 | 5/95 |
| 3 | CP?N°1 * | AP?N°1 | 20/80 |
| 4 | CP?N°2 | AP?N°1 | 30/70 |
| 5 | CP?N°2 | AP?N°1 | 20/80 |
| 6 | CP?N°1 * | AP?N°2 | 5/95 |
| 7 | CP?N°1 * | AP?N°2 | 20/80 |
| 8 | CP?N°3 + | AP?N°2 | 5/95 |
*The polycondensate of Epicholorohydrin and dimethylamine (available from the FL2250 of French SNF).This polymkeric substance is a straight chain, has the limiting viscosity of cationic degree and the 0.04dl/g of 7.3meq/g.
+ Dyhard RU 100, formaldehyde and NH
4The polycondensate of Cl (available from the DEC 50 of French SNF).This polymkeric substance comprises the small amounts of chlorine ion.
Sprawl test as follows.Cut the no bottom die of shape (truncated shape) (bottomless mold) with freshly prepd filled with mortar, described mould is Abrame circular cone (referring to NF18-451 standard, 1981) in the replica of 0.5 ratio and has following size:
Top base circular diameter 50+/-0.5mm
Following basal plane circular diameter 100+/-0.5mm
Height 150+/-0.5mm
Described mortar is divided into three isopyknic batch to be inserted, and uses steel tamping bar compacting 15 times between each batch, and described steel tamping bar diameter is 6mm and has spherical bar head.The upper surface of circular cone is a level, vertically mentions circular cone subsequently.Use vernier callipers at preset time four diameter measurements under at interval according to 45 ° sprawl.The result who sprawls measurement be the mean value of 4 numerical value+/-1mm.Described test is carried out under 20 ℃.
In order to estimate the susceptibility of softening agent of the present invention, sprawl measurement by the character that changes sand and cement.As a comparison, use anionic polymer to measure separately.The results are shown in the following table 5.Consumption is expressed as the softening agent dry weight % with respect to the weight of cement in the cement composition.Adjust consumption so that 15 minutes spread values between 300 to 340mm.
Table 5: the mobile maintenance
Can see that from the result admixture that comprises cationic polymers and anionic polymer is more effective than independent anionic polymer.
In fact, the mixture of application cationic polymers/anionic polymer can reduce the usage variance of viewed independent use anionic polymer between different cement compositions.Therefore, for embodiment 6 and 7, viewed usage variance is 0.17 to 0.18 weight %, and for independent use anionic polymer, usage variance is 0.22 to 0.23 weight %.
In addition,, compare, keep even in admixture, have the flowability that minimum cationic polymers (1 to 5 weight %) also can improve in time with the independent anionic polymer of same amount according to embodiment 1 and 2.
Therefore, for have low keep in time with available from the cement (cement 2) of Le Havre with for the mortar of siliceous-limestone sand (sand 2) preparation of Palvadeau, compare with independent anionic polymer, sprawl after can observing 90 minutes and improved at least 20%.
This improvement is obvious especially on the composition levels with low maintenance in time.This causes in the different mortars of being studied the viewed hold-time more approaching.
In a word, from these the test as seen, comprise the admixture of anionic polymer and cationic polymers as described and can reduce usage variance, and improve the maintenance loss (retention loss) of described hydraulic binder with hydraulic binder that different chemical forms.
Claims (13)
1. admixture that is used for hydraulic binder composition, described admixture comprises at least a cationic polymers and at least a anionic polymer, at least a in the described polymkeric substance has pectination, and wherein the mass ratio of anionic polymer/cationic polymers is 99.9/0.1 to 60/40.
2. admixture as claimed in claim 1, wherein said anionic polymer comprises the silanol side group.
3. admixture as claimed in claim 1 or 2, wherein said anionic polymer has pectination.
4. as the described admixture of one of claim 1 to 3, wherein said polymkeric substance with pectination comprises the side group of polyoxyalkylated.
5. as the described admixture of one of claim 1 to 4, wherein said polymkeric substance with pectination comprises (methyl) acrylic acid derivative moiety on its main chain.
6. as the described admixture of one of claim 1 to 5, wherein said anionic polymer has the limiting viscosity less than 1.5dl/g.
7. as the described admixture of one of claim 1 to 6, wherein said anionic polymer has the limiting viscosity less than 1.0dl/g.
8. as the described admixture of one of claim 1 to 7, wherein said anionic polymer has the limiting viscosity less than 0.8dl/g.
9. as the described admixture of one of claim 1 to 8, the cationic degree of wherein said cationic polymers does not depend on the pH value.
10. be used to prepare the method for one of aforesaid right requirement described admixture, wherein mix at least a cationic polymers and at least a anionic polymer in suitable solvent, at least a in described two kinds of polymkeric substance has pectination.
11. described admixture conduct is used for the application of the softening agent of hydraulic binder composition as one of claim 1 to 9.
12. application as claimed in claim 11, it is used to keep the flowability of described hydraulic binder composition.
13. the application of claim as described above, wherein said hydraulic binder composition are cement composition.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0601043A FR2897057B1 (en) | 2006-02-06 | 2006-02-06 | ADJUVANT FOR HYDRAULIC COMPOSITIONS. |
| FR0601043 | 2006-02-06 | ||
| PCT/FR2007/000196 WO2007090948A1 (en) | 2006-02-06 | 2007-02-02 | Adjuvant for hydraulic compositions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101379006A true CN101379006A (en) | 2009-03-04 |
| CN101379006B CN101379006B (en) | 2012-07-18 |
Family
ID=36129665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800046925A Active CN101379006B (en) | 2006-02-06 | 2007-02-02 | Adjuvant for hydraulic compositions |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US7935748B2 (en) |
| EP (1) | EP1984309B1 (en) |
| CN (1) | CN101379006B (en) |
| BR (1) | BRPI0706429B1 (en) |
| CA (1) | CA2641306C (en) |
| FR (1) | FR2897057B1 (en) |
| RU (1) | RU2008135975A (en) |
| WO (1) | WO2007090948A1 (en) |
| ZA (1) | ZA200805803B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103145363A (en) * | 2013-03-07 | 2013-06-12 | 北京新奥混凝土集团有限公司 | Polycarboxylic acid water reducer for recycled aggregate concrete and preparation method thereof |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2937032B1 (en) * | 2008-10-10 | 2011-06-03 | Lafarge Sa | COMPOSITION BASED ON HYDRAULIC AND / OR POUZZOLANIC MATERIAL OTHER THAN CLINKER |
| FR2948118A1 (en) * | 2009-07-17 | 2011-01-21 | Coatex Sas | Additive, useful as dispersing agent and inerting agent of clays, for aqueous suspensions of calcium sulfate hemihydrate containing clay and for the manufacture of natural gypsum board, comprises an anionic and cationic comb polymer |
| US8461245B2 (en) * | 2011-02-15 | 2013-06-11 | W.R. Grace & Co.-Conn. | Copolymers for treating construction aggregates |
| CN103748054B (en) * | 2011-08-10 | 2017-03-29 | Sika技术股份公司 | It is dried the method for concrete dispersant |
| WO2015139221A1 (en) * | 2014-03-19 | 2015-09-24 | Rhodia Operations | New copolymers useful in liquid detergent compositions |
| RU2635420C1 (en) * | 2016-08-04 | 2017-11-13 | Вячеслав Николаевич Попов | Plastifying additive for building solutions |
| DE102019205397A1 (en) * | 2019-04-15 | 2020-10-15 | Ionys Ag | Fiber separation using polyion complexes |
| US20230107433A1 (en) | 2020-02-27 | 2023-04-06 | Basf Se | Uncharged clay blocking agent |
| MX2023007487A (en) | 2020-12-21 | 2023-07-04 | Holcim Technology Ltd | Low carbon concrete composition and a method to produce a low carbon concrete composition. |
| CN117624510A (en) * | 2023-12-12 | 2024-03-01 | 河北化工医药职业技术学院 | Modified polycarboxylate superplasticizer and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4158521A (en) * | 1978-06-26 | 1979-06-19 | The Western Company Of North America | Method of stabilizing clay formations |
| JPS5929146A (en) * | 1982-08-09 | 1984-02-16 | Kuraray Co Ltd | Preparation of water curable extrusion molded product |
| JPH0292852A (en) * | 1988-09-27 | 1990-04-03 | Nippon Shokubai Kagaku Kogyo Co Ltd | Cement dispersant |
| US5685902A (en) * | 1994-12-19 | 1997-11-11 | Mitsubishi Chemical Corporation | Carbon fiber-reinforced concrete and method for preparing the same |
| CN1130605A (en) * | 1995-03-08 | 1996-09-11 | 中国石化齐鲁石油化工公司 | Cement modifier |
| DE19513126A1 (en) * | 1995-04-07 | 1996-10-10 | Sueddeutsche Kalkstickstoff | Copolymers based on oxyalkylene glycol alkenyl ethers and unsaturated dicarboxylic acid derivatives |
| CA2294429C (en) * | 1997-06-25 | 2003-12-09 | W.R. Grace & Co.-Conn. | Admixture and method for optimizing addition of eo/po superplasticizer to concrete containing smectite clay-containing aggregates |
| JP4223612B2 (en) * | 1998-12-28 | 2009-02-12 | 昭和シェル石油株式会社 | Fast-curing asphalt emulsion |
| US6559233B2 (en) * | 2001-07-13 | 2003-05-06 | Rhodia Chimie | Composition comprising a copolymer at least two charged blocks and type of opposite charge |
| EP1319676A1 (en) * | 2001-12-14 | 2003-06-18 | Cognis Iberia, S.L. | Anion-polymers |
| EP1380600B1 (en) * | 2002-07-11 | 2005-09-21 | Kuraray Co., Ltd. | Polyvinyl alcohol and method for producing polyvinyl alcohol |
| FR2861400B1 (en) * | 2003-10-22 | 2005-12-30 | Rhodia Chimie Sa | PROCESS FOR PREPARING MODIFIED SURFACE CHEMISTRY LATEX, LATEX THAT CAN BE OBTAINED BY THIS PROCESS AND USES THEREOF IN THE FIELD OF CONSTRUCTION |
| CA2583364C (en) * | 2004-09-21 | 2012-03-20 | Lafarge | Impurity inerting compostion |
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2006
- 2006-02-06 FR FR0601043A patent/FR2897057B1/en not_active Expired - Fee Related
-
2007
- 2007-02-02 CN CN2007800046925A patent/CN101379006B/en active Active
- 2007-02-02 CA CA2641306A patent/CA2641306C/en not_active Expired - Fee Related
- 2007-02-02 BR BRPI0706429-2A patent/BRPI0706429B1/en not_active IP Right Cessation
- 2007-02-02 WO PCT/FR2007/000196 patent/WO2007090948A1/en active Application Filing
- 2007-02-02 US US12/158,816 patent/US7935748B2/en active Active
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- 2007-02-02 RU RU2008135975/03A patent/RU2008135975A/en unknown
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2008
- 2008-07-02 ZA ZA200805803A patent/ZA200805803B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103145363A (en) * | 2013-03-07 | 2013-06-12 | 北京新奥混凝土集团有限公司 | Polycarboxylic acid water reducer for recycled aggregate concrete and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2641306A1 (en) | 2007-08-16 |
| ZA200805803B (en) | 2009-11-25 |
| CA2641306C (en) | 2014-03-25 |
| CN101379006B (en) | 2012-07-18 |
| EP1984309A1 (en) | 2008-10-29 |
| FR2897057A1 (en) | 2007-08-10 |
| RU2008135975A (en) | 2010-03-20 |
| FR2897057B1 (en) | 2008-06-13 |
| WO2007090948A1 (en) | 2007-08-16 |
| US7935748B2 (en) | 2011-05-03 |
| EP1984309B1 (en) | 2017-04-05 |
| BRPI0706429A2 (en) | 2011-03-29 |
| US20080300344A1 (en) | 2008-12-04 |
| BRPI0706429B1 (en) | 2017-06-20 |
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Effective date of registration: 20181214 Address after: Swiss Yunus Patentee after: HOLCIM TECHNOLOGY Ltd. Address before: Swiss Yunus Patentee before: Lafarge Holsim Co.,Ltd. Effective date of registration: 20181214 Address after: Swiss Yunus Patentee after: Lafarge Holsim Co.,Ltd. Address before: Paris France Patentee before: LAFARGE |